Mechanical baking oven



Jufly 15, 1924. 1,501,456

' J. JIRASEK MECHANICAL BAKING OVEN Filed June 15. 1923 o INYENTOJ? \1 7 gmu/ozji, T 36-664 W ATTORNEY Patented July 15, 1924.

4 STATES JOHNFIRASEK, 0F DEIROIT, MICHIGAN.

MECHANICAL BAKING OVEN.

Application filed J'une 15, 1923. Serial No. 645,612.

'certain new and useful Improvements in a Mechanical Baking Oven, and declarethe following to be a full,'clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

The object of my invention is to construct a mechanical baking oven, having an internal carriage installed therein, for removing the contents of the oven without reaching into the hot compartment, thus avoiding the possibility of being burned.

A further object is to construct an oven carriage that may be retained within the oven, and operated by external mechanical means.

A still further object is to provide a mechanical oven, equipped with a mechanical lighting and ventilating apparatus.

Another object is to construct a mechanical-oven that is simple in construction, easily and eflicie'ntly operated and can be manufactured at a low cost.

The several objects are secured in their preferred. form by the construction and arrangements of parts more fully hereinafter described.

Similar parts on all drawings are marked by similar numerals.

Fig. 1, is a front view of the mechanical oven showing the relative position of the oven carriage, mechanical ventilator and the lighter.

Fig. 2, is a sectional view A A of Fig. 1, showing the general construction and the operating mechanism.

Fig. 3 is a sectional view B B of Fig. 1, showing the mechanical lighter as in stalled in connection with the oven burners.

I'will now describe more fully the detailed construction of the mechanical oven, and the operating parts, referring to the drawings and the marks thereon.

The oven carriage consists of a metal frame mounted on rollers in such a manner that the carriage can be moved in and out of the oven, yet at all times to be well suported when in its extreme outer position. The metal framesupports interior shelf slides for the adjustable baking grates, and is provided with an external operating lever for moving the carriage in and out of the oven as desired.

The carriage consists of two metal side frames 1, made of flat bars, and bent, forming a quadrilateral, and connected t0- gether by the metal bars 2 and -3-, at the top and bottom of the frames. The connecting bars --2 and 3 are bent at the ends thereof and riveted to the side frames 1, forming a box like frame. Along the back portion of the bottom rail of the frames 1, are mounted the hearing rollers --4.. The rollers 4 can be made of any suitable material as metal or porcelain, and are attached to the inside walls of frames 1, by means of pivots 5, and are free to rotate thereon. The bearing rollers are grooved around the cir cumference to receive the projecting edge of the track 6. The track rail 6 is made of sheet metal, of a rectangular formation, having a short open side to receive the bearing rollers, forming the bearing rail therefor, supporting and guiding the oven carriage as it is moved in and out of the oven. The rail 6 is also provided with an overhanging wall to engage the upper edge of the rollers 4, for preventing the carriage from being tilted from the track rail when moved to its outer position. The rails 6 are connected together by the cross bars 7, riveted thereto at the ends, holding the track in alignment for the engaging rollers. The cross bars are attached to the bottom of the oven by the screws 8, thus holding the track in a rigid position. Attached to the inner sides of the frames 1, are the shelf supports 9,

formed of sheet metal, crimped in parallel seams for forming the shelf bracket -10-. On top of any set of brackets may be inserted the oven shelf 11 for supporting the contents placed therein. for baking. Along the front edge of the oven, near the top, is mounted the operating shaft 12', supported by the end hearings in the oven walls, and provided with an operating handle 13, attached to the outer end of the shaft, outside the oven wall. On the inside of the oven, near the side walls, and attached to the shaft 12, are the o rating arms 14-, extending downwar to the bottom of the oven, in position to swing backward and forward with the shaft 1 track. Attached to the lower rail of the fume door 28.

side frame 1, is a draw bracket -17,

carrying attached thereto the draw bar l8- which extends through the side wall of the oven. The outer end of the bar -18- is provided with a handle 19. After the oven door 20- has been opened, the oven carriage may be drawn out directly by means of the draw bar -18, instead of the operating mechanism under control of the handle 13. A stationary handle 21 is attached to the front cross bar 3 for steadying the carriage as it is being withdrawn from the oven, and which may also be used as an operating handle if desired. Attached to the top of the oven is a ventilating chamber formed by the horizontal wall 22- extending over the top but having an open space around the outer edge thereof. Above the oven is located the fume chamber 23, provided with an outlet pipe 24.- at the top connecting with the chimney. The fume chamber 23- is connected with the oven ventilator chamber by the opening channel -25, allowing all of the fumes gathering from the baking materials to pass from the oven. The end of the fume chamber -23 also extends over the open grate section of the stove adjoining the oven and supported on ledge 27, and is connected thereto by means of the opening 26, allowing the fumes from the stove burners also to escape into the chimney. -Attached to the front edge of the ledge 27, and hinged thereto, is the The door 28 may be swung back under the ledge 27, if desired, as shown in the dotted position, and locked by the latch 29 engaging the opening 30- in the back wall of the stove, closing the port opening 26 leading to the fume chamber. When in use for drawing away the fumes from the open grates, the door 28 is opened as shown in Fig. 2, and held in position by the latch 31- engaging the rack 32, attached to the end of the oven wall. The fume door 28 may be adjusted as desired, by engaging difierent notches along the rack 32- Attached to the gas supply pipe 33, leading to the burners under the oven, is the mechanical lighter 34-. The lighter is supplied with two jet ports 35-, po-

sitioned at an angle with the lighter frame, and leading to the oven burners. The lighter 3 is provided with a spring button valve 36-, closing the gas from the mechanical lighter. By pressing the valve stem 36 down, the gas under pressure in the main supply pipe 33, is forced throu h the gas jets 35 and flows toward t e burners -37 under the oven. Above the mechanical lighter 34., located in the front wall of the oven, is a lighting opening 8S. By placing a lighted match through the opening -'38, then operating the mechanical lighter by pressing the button valve -3 6, the flame is carried to the open burner jets 37, igniting them.

I do not wish to be confined to the exact construction and arrangement of my mechanical baking oven, as herein shown and described, but claim any form of operating oven that is substantially a substitution of parts as herein set forth.

Having fully described my mechanical baking oven what I claim as my invention and desire to secure by Letters Patent is:

1. A mechanical oven carriage adapted to installation in a baking oven, comprising a metallic box shaped frame, horizontal baking gratesinstalled within the frame, grooved rollers mounted on each side of the carriage frame, being attached to the back half of the carriage, a C-shaped track and guard rail for each set of rollers, means for fixedly attaching said rails to the bottom of the oven, and a draw handle attached to said carriage frame for moving the carriage in and out of the oven.

2. A mechanical oven carriage adapted to installation in a baking oven, comprising a metal box shaped frame having all sides open, metallic cleats attached to the inside of the frame for supporting baking grates thereon, grooved track rollers mounted on each side of the carriage frame, said grooved rollers being placed near the bottom of the frame and near the back thereof, a C-shaped track and guard rail for each set of grooved rollers, and means for attaching said rails to the bottom of the oven and for keeping the rails in alignment, an operating shaft and handle mounted in the oven above the carriage, said shaft made to rotate in said mountings, operating arms fixedly attached to the operating shaft to rotate therewith, said arms extending near the bottom of the oven carriage, a connecting bar hinged to the lower end of each operating arm and also to a fixed pivot in the side of the oven carriage frame.

In witness whereof I sign this specification.

JOHN J IRASEK.

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